“Are you stupid or something?” You condescend, “Of course, I look like a Stranger, it’s by far the easiest way to get one of them to drop their guard. Guess I forgot how magic is considered child's play to the inquisition might confuse those less magically inclined.”

Bloodgrave Sr looks like he’s about to pop a blood vessel in the red square-like mark that appeared on his forehead. “I’ll have you know I graduated top of my class-”

“Yeah, sure, you peaked in high school, whatever. Heard enough about that from my dad-”

“Is your purpose here just to heckle us?” Bloodgrave Jr, “Because I believe we have much more important concerns at present than whatever unicornshit reason you have for being here. Besides, how can you even be an Inquisitor when you don’t even look older than I?”

You flash the medallion again, making sure all the gawkers in the back can see but not so long anyone can read it, “Whatever business you may think you have is irrelevant as of right now. I am Inquisitor Sarodieu, and your family is officially under investigation under suspicion for conspiracy with Strangers from another world.”

“What is the meaning of this?” The Duke says simply in a more subdued tone, but with a hard edge to his voice. He’s probably realized that he isn’t going to get out of this through simple intimidation of a girl five times his junior. Sorry for him, but you’re a Heroine in a shounen and not one from an NTR doujin.

“Hm, if you’ve stopped being confused about what’s happening here let us continue. Your son here is quite well known for his role in the recent scandal at eh MageKnight Academy, where he, along with multiple other influential noble heirs and a few foreign ones, plotted to humiliate Her Highness the Royal Princess in a rather eccentric fashion. Each member of this conspiracy has an estate in the capital which has recently been the subject of a raid by strange forces; however, each estate housing an heir linked to this humiliation plot has not been targeted.”

“That is absurd!” The Duke yells, “There are so many other reasons why my home might not have been targeted! Has the Inquisition even considered that perhaps its locations outside city bounds are to play or that this is merely a diversion you’ve all fallen for?!”

“We have considered all plausible scenarios. That is why I appeared at your doorstep as an investigator, and you didn’t open your door to an entire legion of knights.” As you say that the Duke seems to calm down somewhat, very susceptible to a nice cop, it seems, though his son looks to be more on guard than ever, though he tried to hide that under a poker face. Does he not realize that turning your face into an impenetrable mask of neutrality practically screams that he’s hiding something? A good liar would actually have at least some faux emotions.

“Now, why don’t the two of you give me a tour of this estate? How about we start upstairs?